Saint Ignatius of Loyola' Church (Spanish: Iglesia de San Ignacio de Loyola) is a Roman Catholic church situated at the Illuminated Block, in Buenos Aires's neighbourhood of Montserrat.

The southern tower and the present facade were built in 1686, and the rest of the Church construction started in 1712.

[1] Saint Ignatius is the oldest church preserved in Buenos Aires, and was declared a National Historic Monument in 1942.

[2] On June 16, 1955, during a government campaign against the Church, after a failed revolution against Juan Domingo Perón's government, Peronist mobs burnt most churches of Buenos Aires, including Saint Ignatius.

This article about a Roman Catholic church building in Argentina is a stub.